Dice the chicken breast into small bite-sized pieces and toss in a bowl with cornstarch, sea salt, and black pepper until evenly coated.
In a small ramekin, whisk together the honey, tamari, minced garlic, and grated ginger to create the stir-fry sauce.
Heat the sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the chicken pieces to the hot skillet and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Add the broccoli florets and sliced red bell pepper to the skillet, sautéing for another 3-4 minutes until the vegetables are crisp-tender.
Pour the honey-garlic sauce over the chicken and vegetables, tossing constantly for 1 minute until the glaze is thick and glossy.
Serve the hot stir-fry immediately over the portion of warm cooked brown rice.